Today’s announcement of the Sony A7 Mark II, coming just twelve months after the company launched the world’s first full-frame mirrorless camera, is significant for the entire industry. Up to now, any interchangeable-lens camera with a sensor bigger than four-thirds has had to rely on lens-based stabilisation. This is fine for zooms but leaves primes, especially longer primes and legacy lenses, out in the cold. What effect will Sony’s announcement have on other industry players in the large-sensor mirroless game?